Spectra 1 vs 2

I will be a stay at home mom. I would like to be able to pump any extra I’m producing and store it in case I’m not around or need to shower and dad can feed baby.

I’ve heard the most good things about the Spectra but not sure which one to go for. I know the only real different is the rechargeable battery in one and the other is wall plug only.

For a SAHM, which would you suggest?